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From: Andre Przywara <andre.przywara@arm.com>
To: Jaxson Han <jaxson.han@arm.com>
Cc: mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org,
	wei.chen@arm.com
Subject: Re: [boot-wrapper PATCH v2 4/8] aarch64: Prepare for EL1 booting
Date: Mon, 24 May 2021 10:32:50 +0100	[thread overview]
Message-ID: <20210524103250.493e9848@slackpad.fritz.box> (raw)
In-Reply-To: <20210521104807.138269-5-jaxson.han@arm.com>

On Fri, 21 May 2021 18:48:03 +0800
Jaxson Han <jaxson.han@arm.com> wrote:

> When booting from EL1, add a check and skip the init of
> sctlr_el2 in jump_kernel
> 
> Signed-off-by: Jaxson Han <jaxson.han@arm.com>

Reviewed-by: Andre Przywara <andre.przywara@arm.com>

Cheers,
Andre

> ---
>  arch/aarch64/boot.S | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/aarch64/boot.S b/arch/aarch64/boot.S
> index ee9886b..b8f9e4e 100644
> --- a/arch/aarch64/boot.S
> +++ b/arch/aarch64/boot.S
> @@ -144,10 +144,14 @@ jump_kernel:
>  	ldr	x0, =SCTLR_EL1_RESET
>  	msr	sctlr_el1, x0
>  
> +	mrs	x0, CurrentEL
> +	cmp	x0, #CURRENTEL_EL2
> +	b.lt	1f
> +
>  	ldr	x0, =SCTLR_EL2_RESET
>  	msr	sctlr_el2, x0
>  
> -	cpuid	x0, x1
> +1:	cpuid	x0, x1
>  	bl	find_logical_id
>  	bl	setup_stack		// Reset stack pointer
>  


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  reply	other threads:[~2021-05-24 22:43 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-21 10:47 [boot-wrapper PATCH v2 0/8] Add Armv8-R AArch64 support Jaxson Han
2021-05-21 10:48 ` [boot-wrapper PATCH v2 1/8] Decouple V2M_SYS config by auto-detect dtb node Jaxson Han
2021-05-21 10:48 ` [boot-wrapper PATCH v2 2/8] aarch64: Rename labels and prepare for lower EL booting Jaxson Han
2021-05-24  9:32   ` Andre Przywara
2021-05-25  1:54     ` Jaxson Han
2021-05-21 10:48 ` [boot-wrapper PATCH v2 3/8] aarch64: Remove the redundant setup_stack Jaxson Han
2021-05-24  9:32   ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 4/8] aarch64: Prepare for EL1 booting Jaxson Han
2021-05-24  9:32   ` Andre Przywara [this message]
2021-05-21 10:48 ` [boot-wrapper PATCH v2 5/8] aarch64: Prepare for lower EL booting Jaxson Han
2021-05-24  9:33   ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 6/8] gic-v3: Prepare for gicv3 with EL2 Jaxson Han
2021-05-24  9:33   ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 7/8] aarch64: Prepare for booting " Jaxson Han
2021-05-24  9:33   ` Andre Przywara
2021-05-21 10:48 ` [boot-wrapper PATCH v2 8/8] aarch64: Introduce EL2 boot code for Armv8-R AArch64 Jaxson Han
2021-05-24 10:19   ` Andre Przywara
2021-05-25  1:59     ` Jaxson Han

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